Please remember: This is a fun, educational estimate, not a medical prediction. Healthy children come in all shapes and sizes, and many things affect final height. What matters most is steady, healthy growth. If you have any concern about your child's growth, please speak to your doctor or health visitor.
How does this baby height calculator work?
This tool uses the mid-parental height method, the same simple formula doctors often use as a quick guide. Because a child inherits most of their height from their parents, averaging the parents' heights, then adjusting for the child's sex, gives a reasonable estimate of how tall they may grow.
For a boy: (father's height + mother's height + 13 cm) ÷ 2
For a girl: (father's height + mother's height minus 13 cm) ÷ 2
For a girl: (father's height + mother's height minus 13 cm) ÷ 2
In inches, you add or subtract 5 inches instead of 13 cm. The result is a central estimate. A child's actual adult height usually lands somewhere within about 8 to 9 cm either side of it.
Predicted adult height chart
Prefer to look it up? Find the average of both parents' heights, then read across for the predicted adult height of a son or a daughter.
| Average parent height | Predicted son | Predicted daughter |
|---|---|---|
| 152 cm (5 ft 0 in) | 159 cm (5 ft 3 in) | 146 cm (4 ft 9 in) |
| 156 cm (5 ft 1 in) | 163 cm (5 ft 4 in) | 150 cm (4 ft 11 in) |
| 160 cm (5 ft 3 in) | 167 cm (5 ft 6 in) | 154 cm (5 ft 1 in) |
| 164 cm (5 ft 5 in) | 171 cm (5 ft 7 in) | 158 cm (5 ft 2 in) |
| 168 cm (5 ft 6 in) | 175 cm (5 ft 9 in) | 162 cm (5 ft 4 in) |
| 172 cm (5 ft 8 in) | 179 cm (5 ft 10 in) | 166 cm (5 ft 5 in) |
| 176 cm (5 ft 9 in) | 183 cm (6 ft 0 in) | 170 cm (5 ft 7 in) |
| 180 cm (5 ft 11 in) | 187 cm (6 ft 2 in) | 174 cm (5 ft 9 in) |
| 184 cm (6 ft 0 in) | 191 cm (6 ft 3 in) | 178 cm (5 ft 10 in) |
| 188 cm (6 ft 2 in) | 195 cm (6 ft 5 in) | 182 cm (6 ft 0 in) |
Other ways to predict your child's height
- Double the height at age 2. A child's height at age 2 is roughly half their final adult height, so doubling it gives a quick estimate.
- Growth charts and percentiles. If your child tracks steadily along the same percentile line over time, they are likely to stay near that line into adulthood.
- The Khamis-Roche method. A more detailed estimate that combines the child's current age, height and weight with the parents' heights, without needing an X-ray.
- Bone age X-ray. The most accurate medical method, used by doctors when there is a clinical reason to assess growth.
Average baby and child height by age
| Age | Average boy | Average girl |
|---|---|---|
| Birth | 50 cm (19.7 in) | 49 cm (19.3 in) |
| 6 months | 68 cm (26.6 in) | 66 cm (25.9 in) |
| 1 year | 76 cm (29.8 in) | 74 cm (29.1 in) |
| 2 years | 88 cm (34.6 in) | 86 cm (34.0 in) |
| 3 years | 96 cm (37.8 in) | 95 cm (37.4 in) |
| 4 years | 103 cm (40.6 in) | 103 cm (40.4 in) |
| 5 years | 110 cm (43.3 in) | 109 cm (43.1 in) |
Frequently asked questions
How tall will my child be?
The most common estimate uses the mid-parental height method. Add both parents' heights, then for a boy add 13 cm and divide by 2, or for a girl subtract 13 cm and divide by 2.
How accurate is a baby height predictor?
It is a rough guide, not a guarantee. Most children end up within about 8 to 10 cm of the prediction. Height is roughly 80 percent genetic, but nutrition, sleep, health and hormones also play a part.
What is the mid-parental height formula?
For a boy: (father's height + mother's height + 13 cm) divided by 2. For a girl: (father's height + mother's height minus 13 cm) divided by 2. In inches, add or subtract 5 inches instead of 13 cm.
Disclaimer: Well Health Organic Tips provides this calculator and article for general informational purposes only. It is an estimate based on a simple formula and is not a medical assessment or guarantee.